Hello dear, Montus L (pharmacologically Montelukast+ Levocetirizine) is helpful in managing the condition of Allergic bronchitis. Levocetirizine is an anti histamine, which acts as an anti allergic in controlling the acute episode. Montelukast acts as a maintenance therapy to relieve symptoms of allergic rhinitis. Formonide (Formoterol + Budesonide) acts as bronchodilators and relieve breathing difficulty. If you do not consume the medications, their effect reduces & you get prone to acute allergic attacks. This condition is related to the hyper-sensitivity of your immune response. It can only be managed symptomatically. Complete cure will need complete shut down of your immune mechanism, which will make you prone for severe life-threatening secondary infections. So, kindly continue the medications as prescribed by your treating Doctor. Wishing you a good health. Take care.